We are only now starting to look at such markers.In some ways, we need to look at those who were young and otherwise healthy who succumbed to the disease as well as older persons with co-morbidities, certain types of receptors in the lungs might hold some useful information.Other scientists have suggested we need to look at the genetics of blood clotting, or the number of certain interleukins, which can be markers of inflammation. We need more time and data to build a useful profile.